color-swatch.taq

$ java -jar taq.jar color-swatch rgb=0x00fff

Running query query_color in global scope 
Parameters [color-swatch, rgb=0x00ffff]
shade(rgb=65535, color=aqua, red=0, green=255, blue=255, index=0)

$ java -jar taq.jar color-swatch rgb=0x77fff

Running query query_color in global scope 
Parameters [color-swatch, rgb=0x77ffff]
shade(rgb=7864319, color=unknown, red=0, green=0, blue=0, index=4)

Description

color-swatch.taq demonstrates using a familiar default selection strategy. The “swatch” select maps a 32-bit color value to both a color name and the red-green-blue hex components. As it is not possible to map all possible 32-bit color values, a default strategy is required to handle unsupported colors. This is implemented using a final “always true” choice

?? true: “unknown”, 0, 0, 0

Note that the selection result is taken from variables declared in front of the select operantion so there is no need to collect the select return value. In this case the keyword **flow”” is required to launch the select operation

flow swatch(rgb)

Also note the selection index value is available as an additional potentially useful extra.

index = swatch.index()